Improvement in button-hole ctttterj



`To all vwhom it may concern.-

Be it known that I, DAVID H. CUNNINGHAM, of'

waited guente @anni (utilize.

' Letters Patent N 107,009, dated Septmnber 6,1870 -antcdctetl August 20, 1870.

IMPROVEMENT IN BUTTON-HOLE CTTERS.

The Schedule referred to inthese Letters Patent and making part oi thesame.

Waltham, in-the county of Middlesex and State of Massachusetts, have invented a new and improved Mode for Button-hole Gutter; and I-do hereoy declare that the following is a .true and exact description thereof', reference beinghad to the annexed drawing making a part of this specification, in which- Figure 1 is a side View;

Figure 2 is a top view;

Figure 8 is a 4section on the line y z', taken on iig. l and Figure 4 is a section on the line n v, taken on tig. 2.

To enable others skilled in the art to make and use my invention, l will now proceed to .describe its construct-ion andoperation. Figure 1 showsa side view ofvmy improved buttonholecutter, where a a are the handles and b the pin, around which the cutter opens. f

cis the cutter, secured tothe arm c by means of screws, as shown. l l

' (l is the hollow tnbe cutter, screwed into the arm e, 1nd making a joint with the blade c, as shown in.

[n the arm f is hole, directlyv under the tube cutaround the center 71, lwhich is directly under the tube d?, thus always presenting thc same .surface to the said cutter d.

i is a small projection, by which means the baseplate g may easily be turned round the center lt.

At k, in the arm f, is a T-headed cylinder, screwed from above.

'lhe head ot' this cylinder plays into a Tgroove, enit into the base-plate g, and concentric with the center l.

In the cylinder kl'arc a piston and spring, as shown in tig. 4. The upper end of this piston is rounded, so as to t recesses lm n o p q, for `the purpose ot' holding the base-plate rnlly in its position, either as marked h i, or turned so that either of the lines h n, It m', h l', h o', h p', andhl g' becomes the center line of the cutter, or Acorres'ponding to the line lt fi.

By means of turning the .base-plate,fltlie lengthof the hole is altered, as in one case the line h n will be directly under the cutter, and thus out only the length represented by that line, and Aso on with the other ents.

The base-plate g is made of an elliptical form,or the shape generally known as the egg ellipse, vwhereby I obtain great diierence in thelength ot' the cuts, with very little turning from the center line. ln the rear of the base-plate g are gauge-pins rfrjr r r, touching a gauge-plate, s, behind. This plate is foi-'the purpose ot' gauging the vcommencement of a buttonfhole from the edge of the cloth to be operated upon. f

'lhe gauge-plate s is made with a small barft, playing into the arm f. andpressnred forward automatically by means ot' a coiled spring, similar to the one de.Y

scribed atk.

To operate my cutters, turn the base-plate'g on one side 'till the line-indicated on the top corresponds with,

the length ot' the hole to be cnt. Separate the ham dies tt a, when the jaws area-lsoopened, and push the clothor material to be operated upon,` till it touches the gauge-plate s, then pressure the handles a c together and the work is done.

By repeating the above any ordinary lengthof but?l ton-hole may easily be made,`and a great saving in time is thus secured over ordinary cutters.

Having .thus 'described the nature, construct1on,

and operation of' my invention, l

I wish to secure by Letters Patent, and claim- 1. The elliptical base-plate g, revolving around and directly under the circular cutter (l, as described.

l2. ihe T-headed screw k, with the piston and coiled spring, in combination with the T-headed groove and gauge-points on the under side of the baseplate, as set forth.

3. The gauge-plate s, in combination with the projections fr r r lr, for the purpose as fully set forth and described.

DAVID H. CUNNINGHAM. fn. s.]

J. M. SOUTHWIGK, ALBAN ANDREW. 

